Benjamin owns a food truck that sells tacos and burritos. He only has enough
supplies to make 120 tacos or burritos. He sells each taco for $3.75 and each burrito
for $8.25. Benjamin must sell at least $660 worth of tacos and burritos each day. If a
represents the number of tacos sold and y represents the number of burritos sold,
write and solve a system of inequalities graphically and determine one possible
solution.